Safety device for calender-rolls.



W. JAMESON.

SAFETY DEVICE FOR GALENDER ROLLS.

APPLICATION FILED MAY 8, 1909.

Patented June 28, 1919.

2 SHEETS-SHEET 1.

[IVVEIV TOR.

WITNESSES.-

A T T ORNE XS.

W, JAMESON.

SAFETY DEVIGE FOR CALENDER ROLLS.

APPLICATION FILED MAY 8, 1909.

96% 5?2 Patented. June 28, 1910.

2 SHEETS-SHEET 2.

WITNESSES:

[NVE TOR.

I ATTORA f res rarer to.

U KT

WILLIAM JAMESON, OF CHICOPEE FALLS, MASSACHUSETTS, ASSTGNOR TO THE FISK RUBBER COMPANY, OF CHICOPEE FALLS, MASSACHUSETTS, A CORPORATION.

SAFETY DEVICE FOR CALENDER-BOLLS.

962,572, Specification of Letters Patent. Patented June 28, 1910, Application filed May S, 1909. Serial No; 494,772.

To all whom it may cohcern: 1 into the machine, as shownby the direction Be it known that 1, WILLIAM J AMESON, a of the arrow d. v citizen of the United States of America, re- The usual driving and speed gears are siding at Chicopee Falls, in the count of l shown at e, f, g, h, i and j. The clutches 5 Hampden and State of Massachusetts, ave for connecting either the gears a or fto the 60 invented new and useful Improvements in countershaft'lc are shown at m and 0. Safety Devices for Calender-Rolls, of which A line-shaft is shown at p which is prothe following is a specification. vided with a friction disk g thereon.

The present invention relatesto improve- 9" designates a brake-shoe for engaging 10 ments in safety stop mechanisms for calenthe lowerside of the disk g,-when it is de- 5 dering machines. sired to stop the machine after the driving The objects of the invention, are, (1) to power has been shut off. This shoe is opprovide a mechanism by means, of which erated by means of a pear-shaped cam s the rotation of the rolls may quickly be carried by the shipper-shaft t, and the brought to a standstill, should an accident brake-shoe ris guided in its movements by 7 to an attendant occur; to provide a means of the pins u when moved by the mechanism by means of W 10h the speed of i cam. The shaft 23 is rectangular in crossrotation of the rolls may be quickly changed section and is mounted in a bearing a, at one as desired; (3) to provide means for autoend, and connected to the arms w and a: at its matically applying a brake device for bringouter end. These arms,-one of' which is 75 ing the moving parts of the machine to a shown in sectional view in Fig. '7,'-are constandstill, whether the brake device is opernected to the plungers or pistons of the cylated by hand or compressed air. inders y and a, by means of the rods '1 and In the drawings forming part of this links 2 The arms w and m are each bolted 25 application,-Figure 1 is a,p1an view of a to semi-circular cap-pieces 2, as shown at. so calendering machine showing my improve- 3, which arms and pieces 2 encircle a memments attached thereto. Figs. 2 and 8 are her 4, and through which passes the shaft t detail sectional views on the broken line (see Fig. 7) so that when the shaft is op- 2-2, Fig. 1 of the frictional brake device. erated, the arms w and a; will be partially Fig. 4 is an end elevational view of the cylrotated. g inders for receiving compressed air or steam 5 designates a handle that is secured to by means of which the clutch and brake the shaft t and is for the purpose of rocking mechanisms are operated, and showing furthe shaft, whereby the clutches m and 0 ther the operating handle by means of which may be thrown into or out of operative enthe clutches may be operated and the pisgagement, and also for moving either of the tons of the air cylinders moved to the botarms w and m, whereby the pistons 6 of the tom or air-receiving end thereof. Fig. 5 cylinders y and z are operated. is a detail view in side elevation of the oper- 7 is a spring-pressed pawl pivoted to e ch ating handle and an attached lever for f th arms w d w d hi h ngag a 40 throwin into actlon a spring-ac shoulder portion 8 in the three flange p01- valve, w ereby-the machine may be stopped. ti 9 f th h l b r 10 which ig- 6 is a detail vi w of the valve in moves with the shaft t when operated by the tion, and th P r inp n after ng handle 5. This operation of the handle released by the operatlng handle, the operc uses one or the other of the arms w and w 45 ating lever being shown in a drawn back poto turn on the disk 4' of the channel member sition. Fig. 7 1s a detail SGCtIQIla-l view on 10 so that one of the pistons 6 may be moved the line 77 f Fig, g- 8 a sectlQllal downward to its lower position, as shown in View the-line of g dotted lines in Fig. 4, since the pawl will Referring to the. drawings in detail, in engage the shoulder/portion 8 (see-F 1g. 7)

50 which the samereference characters desigon that side of the flange portions 9 of the 1 5 nate the, same parts in the several Vl8 WS2 a cha n l b r 10 wh n the handle is designates the framework of the machine 1n moved in that direction (see Fig. 4). The

which is mounted the calender rolls, only one other piston of course remains unmoved in of which appears, as shown at b. anupward position.

'55 The paper is indicated at c as being fed Connected with the bottom portion of each cylinder 3 and z is a pipe 11, by means of the branches 12, which pipe leads to the forward or feed side of the machine, a relief valve is shown at 13 to permit the confined air in the pipe 11 to escape when the pistons 6 are moved down.

Air, or steam under pressure, to the pipe 11 tion 14. The communication between the upright 14 and the pipe 11 is controlled by means of a valve 15, the plug of which is operated by means of an L-shaped arm 16 which normally holds the valve closed, as shown in Fig. 5, by means 17 on a lever18 which is port at 19., I

' A rod 20 is attached to the lever 18 and is provided with a handle 21, as shown in Fig. 1, that extends to the feed or front side of the machine within reach of the attendant .at that point.

A coiled spring 22 is attached to the L- shaped arm 16 and ipe 14 respectively, for holding the plug of the valve in a closed position.

Connected at 24 to one end of the lever 18 is a rod 25 that extends across the front of the machine, the free endbeing connected to a pivotal arm 26.

The operation of the machine isas follows: If the operator wishes to stop the machine he may do ,so by releasing the L- shaped arm 16, permitting the spring 22 to open the valve 15 and allow air 'or steam, under pressure, to enter the pipe 11, branches 12, and cylinders 3 and a, causing the piston 6 to be elevated, rocking the shaft t, throwing either one' or the other of the clutchesm or-o machine will be is supplied pivoted to a supstopped. At the same time,

the cam .9 moves the brake-shoe 1' against,

9 in order to lessen'the momentum e moving parts. Should the attendant at feed side of the machine accidentally be caught between the rollers, so that he would be deprived of the use of his hands, he could, by-pressing with his head or body, operatethe rod 25 which, in turn, would trip the arm 16 and cause the machine to come to a standstill, as already described.

It should be stated that the valve 13 is closed after the piston 6 is set, as described, in its lowermost position, so that as the compressed air enters, it will not escape to the atmosphere.

It should be understood that by employing two cylinders and two sets of clutches two speedsare employed for driving the machine, and that when one piston is left idle 'amsm therefor,

by means of the upright porof a lug or tooth calender machines,

to be operated,whereby the I, evices will the forward or the other is in use, as clearly shown in Fig. 4. o

What I claim, is Y '1. In a stop mechanism for calender rolls, in combination, a line-shaft, a clutch mechoperatingthe clutch mechanism, said fluid pressure mechanism including a cylinder, a piston therein, and a pawl and ratchet connection between the piston and said clutch mechanism, substantially asdescribed.

fluid pressure mechanism for 2. In a stop mechanism, a shaft, fluid pressure mechanism associated therewith,

said mechanism comprising a cylinder, a

piston in said cylinder, an arm on the shaft, a ratchet device for connecting the arm to the shaft, whereby the shaft may be operated from the piston, or the piston from the shaft, substantially as described.

3. In a stop mechanism for calender machines,- in combination with the drive-shaft thereof, a' brake device, a fluid pressure mechanism for operating the brake device, comprising a cylinder, a piston therein, a pipe connection leading to the cylinder, a valve in said connection, means, including a spring-actuated arm for maintaining the valve in a closed position, and a trlp device forreleasing said arm, said tripdevice including a lever, a lug on said lever for retaining said armin an inoperative position, substantially as described.

' In a fluid pressure stop mechanism for in combination, a shaft, a clutch and brake device therefor, a shipper shaft, a collar thereon and movable therewith, an arm mounted on the collar, and ratchet devices on the arm for engaging the collar, a cylinder, a piston therein, a connection. between the piston and arm,

whereby when a fluid under pressure is sup-' lied to the cylinder, the clutch and brake be operated, substantially as described.

. AVITT.

handle connected to (1 pressure mechanism 

